Some initial experiments with an electrically conducting powder under static and vibrating conditions

A. J. Matchett, Takeshi Yanagida, Y. Okudaira, S. Kobayashi, M. Satoh

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

An electrically conducting powder was produced by mixing bronze spheres with a small amount of carbon black powder. The potential difference across beds of this powder was measured under static conditions and vibration. The system was very sensitive and monitored changes during vibration cycles at rapid rates. Horizontal and vertical conductances were measured. Above a minimum vertical stress, the ratio of the two was constant. The conductance was related to vertical stress by a linear relationship with hysteresis, for both static conditions and vibration at small accelerations. A simple model has been proposed to describe this system. At high accelerations (< 10 m/s2) changes were much larger. There were permanent changes in conductance and the system was non-linear. The data demonstrate that the internal structure of a particle bed displays great sensitivity, hysteresis and a dependence upon stress history.

Original languageEnglish
Pages (from-to)51-64
Number of pages14
JournalAdvanced Powder Technology
Volume10
Issue number1
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Mechanics of Materials

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